Electromagnetic valve device and use thereof

ABSTRACT

The invention relates to an electromagnetic valve device having an armature (18) which is moveable in an axial direction in a valve housing (10) in response to energizing of a stationary coil (12), and which is designed to interact with a first valve seat (22) associated with a fluid inlet connection (26) of the valve housing, a first fluid flow path (36) being formed in the valve housing such that fluid flowing through the opened first valve seat can flow in order to actuate a plunger (32) moveable relative to the armature (18) and to which a preloading force is applied, the actuation causing a second valve seat (43) interacting with the plunger (32) to be opened to produce a fluid connection to a fluid working connection (42) of the valve housing, and the valve housing having a fastening structure (44, 46) in the form of at least one hole extending at an angle to the axial direction, the fluid inlet connection (26) and the working connection (42) being formed on the same axial side of the valve housing in relation to the structure means.

CROSS REFERENCE TO RELATED APPLICATION

This is a continuation of U.S. patent application Ser. No. 16/062,921filed Jun. 15, 2018 which is a US national stage application ofPCT/EP2016/078513 dated Nov. 23, 2016, which claims the benefit ofEuropean Patent Application No. 20 2015 106 864.6 filed Dec. 15, 2016,the disclosure of which is incorporated by reference herein in itsentirety as if set forth at length.

BACKGROUND OF THE INVENTION

The present invention relates to an electromagnetic valve deviceaccording to the preamble of the main claim. The present invention alsorelates to a system having a plurality of such electromagnetic valvedevices, and the present invention relates to the use of such anelectromagnetic valve device.

Electromagnetic valve devices according to the preamble of the mainclaim are generally known from the prior art and are used, for instance,for a wide variety of switching and control purposes, in particular inthe form of pneumatic valves in the context of motor vehicles, inparticular utility vehicles. In a conventional configuration, forinstance in the form of a 3/2-way pneumatic valve having three fluid(pneumatic) connections and two switching positions, the armature meanseffect the switching movably in response to the energizing of stationarycoil means in the valve housing, in an otherwise known manner; in thepresent, more specific context of what are known as booster-assistedvalves, an additional mechanical boosting function of the fluid circuitis implemented. Specifically, again in the manner in question, thecontrolled movement of the armature means effects the opening andclosing of a first valve seat associated with the fluid inlet connection(pressure connection) of the valve housing. The open first valve seatallows the inflowing pneumatic fluid to enter a first fluid flow path,from where the fluid acts to actuate plunger means (as an essentialassembly of the booster technology). In the process, the fluid pressureof the fluid flowing into the inlet connection overcomes a counter force(generated by a preloading spring or similar energy storage means, forinstance) of the plunger means and moves them until a second valve seat(which has been closed by the plunger means until now) is opened. Thisthen allows the fluid to flow to the fluid outlet connection.

In particular against the background of a larger realizable (fluid)cross-section, such booster technology for providing mechanical forceassistance for electromagnetically operated valves has becomeestablished and proven effective.

However, the plunger means which are used therefor and are designed tointeract with the second valve seat require additional axialinstallation space in the valve housing (“axial” in the context of thepresent application meaning a movement direction of the armature means,in this respect and preferably corresponding to an extension orlongitudinal axis of the valve housing), in particular in case theplunger means, as an essential booster assembly, axially continue thearmature means in the valve housing. Owing to restricted installationconditions, for instance in the context of motor vehicles, there is aneed for optimization and shortening, not least when a generic valvehousing also has, in addition to the fluid inlet connection and fluidworking connection (which usually project in a flange-like manner fromthe housing shell), fastening means which has at least one hole, buttypically a pair of bores extending transversely to the axial directionfor screw-fastenings or the like to be used for mounting purposes. Aswell as the installation space needed to accommodate the coil means(including the connector section which sits on the outside of thehousing), there is thus an axial extent in need of optimization.

In generic valve devices assumed to be generally known from the priorart, it is known, not least to optimize the axial dimension of a knownvalve housing, to provide the plunger means geometrically in the axialregion of the fastening means; it is in particular known, if thefastening means are in the form of a pair of mutually parallel fasteningbores, to accommodate the plunger means between said bores in thehousing.

While this measure is favorable from a standpoint of an optimized axialextent of the valve housing, technical disadvantages are also produced:Firstly, the geometry of the fastening means (which is usually based onstandardized holes or on standardized distances between the bores)limits an effective transverse extent of the plunger means, in thisrespect also a force application area for the fluid usable for thebooster effect. Secondly, such a solution means that again the fluidinlet connection and the fluid working connection must be arranged onmutually opposite sides of the fastening means (that is, usually of thepair of fastening bores) in the axial extension direction of the valvehousing, which in turn entails a negative effect on a total axial extentof the device.

Furthermore, U.S. Pat. No. 3,757,818 A and US 2003/193149 A1 are knownfrom the prior art.

U.S. Pat. No. 3,757,818 A describes two normally closed three-way mainvalves which are connected in series in order to supply fluid to anoutlet port. In the closed positions, the valves establish parallelconnections from the outlet port to the ventilation. If one of the twovalves is stuck in an open or partially open position, the movement ofthe remaining valve into its closed position offers a good ventilationcapability. Additionally, there is no substantial pressure at the outletport until both valves are displaced into the respective open position.The movement of one of the two valves into its outlet position stops theair supply to the outlet port entirely and allows for a direct outletconnection.

US 2003/193149 A1 discloses a kneeling valve assembly for transportvehicles to enable a quick and convenient kneeling operation to permitsafe ingress and egress from the vehicle.

The kneeling valve assembly employs a suspension member positionedbetween the vehicle body and the axle of the transport vehicle to raiseand lower the transport vehicle relative to a ground level. The kneelingvalve assembly includes a first valve that is operable to selectivelypermit fluid flow between the inlet passage and the suspension member toraise the transport vehicle relative to the ground level. A second valveis provided that is operable to selectively permit fluid flow betweenthe suspension member and the exhaust passage to lower the transportvehicle relative to the ground level. A leveling trigger is fluidlycoupled to the inlet passage and is operable to determine a height ofthe transport vehicle relative to the ground level. Finally, a thirdvalve is provided that is operable to selectively permit fluid flowbetween the inlet passage and the suspension member to maintain apredetermined height above the ground level.

SUMMARY OF THE INVENTION

The object of the present invention is therefore to improve anelectromagnetic valve device according to the preamble of the main claimin terms of its geometric and functional properties, in the processallowing in particular an optimized (and thus widest possible inpractice) extent of the plunger means in the valve housing and thusoptimizing the mechanical assistance effect of this booster technologywithout disadvantageously lengthening the total axial extent of thevalve housing unnecessarily.

The object is achieved by the electromagnetic valve device having thefeatures of the main claim; advantageous developments of the inventionare described in the dependent claims. Additional protection is soughtin the invention for a use of the electromagnetic valve device accordingto the invention as a 3/2-way pneumatic valve for switching and controlapplications in the field of motor vehicles, the field of utilityvehicles being particularly favorable and preferred. Finally, protectionis sought in the present invention for a valve system having a pluralityof valve devices according to the invention which are connected to oneanother by means of the holes which each realize the fastening means andcan thus form a compact, flexible, easily assembled and operationallyreliable unit.

In an advantageous manner according to the invention, the design of thevalve housing, of the plunger means, of the first fluid flow path to theplunger means and of the fluid connection to the fluid workingconnection ensures according to the invention that both the fluid inletconnection and the fluid working connection are on a common (axial) sidein relation to the fastening means. This means firstly that, favorablyfor an optimized axial extent of the overall arrangement in the valvehousing, it is possible to arrange the fluid inlet connection and thefluid working connection adjacently to each other, and furtherpreferably to offset them radially and/or axially to each other, in ageometrically favorable and potentially space-saving manner. At the sametime, this geometry allows the plunger means to be provided such thatthey can move axially in the region of the fluid inlet connection andfluid working connection, with the advantageous consequence that amaximum usable plunger width is limited only by an effective housinginner diameter or connection ducts provided therein and not, as in theprior art which is assumed to be known, by the substantially narrowergeometry of the fastening means, which is defined by standardizedfastening conditions and thus by fixed bore spacings provided. Anadvantageous consequence is also an optimized switching behavior (whichis boosted by the booster technology) of the device.

In the context of these specifications according to the invention,different preferred variants of the invention also allow the valvehousing together with the fastening means formed thereon and the fluidconnections to be adapted to different requirements and installationspace conditions, so that valve devices which are simple to produce,suitable for series production and highly operationally reliable can bedesigned and configured for a wide variety of environments thanks to thepresent technology, in particular if the valve housing is divided in apreferred, modular manner into a first housing assembly designed toaccommodate the coil means and an associated connector region providedfor external contact and into a second valve housing assembly which canbe attached axially to the first housing assembly and is designed toform the fluid connections and the fastening means.

The flange-like fluid connections which protrude laterally from alateral surface of the preferably at least partially cylindrical housing(and sit as a single piece), specifically the fluid inlet connection andthe fluid working connection, thus make it possible to adapt todifferent use conditions and to further optimize installation space: Forinstance, it is preferred to offset these fluid connections to eachother in the radial direction, this radial offset, that is, an angle ordistance formed between the connections in a plane perpendicular to theaxial direction, can be provided such that the fluid inlet connectionand the fluid working connection are mutually opposite in relation tothe housing center axis. Alternatively, according to a development, thetwo connections can be adjacent to each other in the radial plane,spaced by merely a minimal distance or can even overlap in the radialplane.

In this situation, an offset in the axial direction would then allow themost compact possible connection region of these two connections, whichin this respect are then arranged obliquely in relation to an outerlateral surface of the valve housing.

In particular, the arrangement and orientation of the fluid connectionsrelative to the fastening means having at least one hole, preferably apair of mutually parallel bores, allows additional geometric design anddevelopment possibilities. For instance, it is favorable according to apreferred embodiment of the invention to provide an angular position ofthe fluid inlet connection and/or of the fluid working connection in theplane perpendicular to the axial direction, that is, in the radialplane, at right angles to the angular orientation of the hole, thismeasure in particular simplifying a connection or access to the fluidconnections if, for instance in the context of the system according tothe invention, a plurality of the valve housings according to theinvention is connected by means of the fastening means and in thedirection of the holes abutting one another and defining a mountingdirection. This effect is also achievable if the angular offset is notexactly 90° but is preferably realized in a typical range between 70°and 110°.

A comparable optimization possibility is provided by the geometricorientation of the hole and/or of at least one of the fluid connectionsrelative to a lateral extent of a connector section which protrudesradially from the valve housing (and again preferably sits as a singlepiece thereon) and, again in a preferred development, can be provided onan end section, axially opposite the fastening means, of the valvehousing. To make the electrical and pneumatic connections simple anduniform, it could correspondingly be preferred to form this connectorsection and at least one of the fluid connections flush or without an(angular) offset formed therebetween, in the radial plane, i.e. in theplane perpendicular to the axial direction.

The realization according to the invention, which again falls within thesystem concept of the invention as already discussed above but isclaimed independently and has advantages, lies in providing the valvehousing with an additional fluid connection which is connected to thefluid inlet connection such that it leads through to the fluid inletconnection and is thus permanently not influenced by the switchingbehavior of the valve device. If this additional fluid connection isformed according to the invention in the region of the fastening meansand further preferably formed in a manner extending parallel to anextension direction of the at least one hole in the fastening means, theadvantageous possibility not only arises, when a plurality of valvehousings (and correspondingly valve devices according to the inventionformed therewith) are joined together within the meaning of the systemaccording to the invention, of forming a continuous mechanical couplingor connection by means of the holes which can be oriented towards oneanother continuously, but also in this embodiment the likewisecontinuous (that is, crossing the valve housing) additional fluid inletconnections align with one another and allow a direct (fluid) connectionto an adjacent fluid connection in each case. For the purpose of sealingand a pressure-tight design, additional suitable coupling means or thelike to be adapted could be provided here, either as integrated sectionson or in the housing or as additional assemblies which can be used asrequired.

Such a development is particularly elegant in that, in a preferredembodiment of the fastening means by means of a pair of holes whichwould then likewise realize a pair of connecting and fastening boresrunning parallel to each other, this additional fluid connection couldthen be provided centrally between the pair of holes, producing alikewise compact device which is simple to align and mount.

A further advantageous development of the invention for which protectionis also sought independently in conjunction with the features of thepreamble of the main claim, lies in the development embodied independent claim 10, according to which a ventilation path forventilating a working space formed between the armature means and a core(core means) (preferably provided at the axial end in the valve housing)is created in a particularly favorable manner in design and productionterms. Specifically, this ventilation, which according to demands whichare often made of valve devices according to the invention (and genericones), promotes venting at the axial end of the valve housing on theside of the fastening means, would be realized in that a necessaryventilation duct is split into multiple paths, and then a connection ofthese paths is produced in a particularly elegant manner in design andproduction terms by a cover assembly or cap assembly without the needfor complex radially extending transverse ducts or similar formations inthe valve housing. Specifically, this solution provides for a firstventilation path to be made in or on (e.g. on the outer side of) thecore means, allowing a fluid flow parallel to the axial direction. Asecond ventilation path would then be provided, again at least partiallyparallel to the axial direction on or in the valve housing; this can bemade in particular by a duct formed in the outer region, for instance.The particularly elegant design of a cover section or cap section as aseparate assembly then allows these two ventilation paths to beconnected in the end region or end face region of the valve housing(i.e. at the end of the core), without the need for a problematic radialformation in the housing itself. This function could be realized,rather, by a groove or similar notch, which can be provided in the capor cover, additionally or alternatively in the (in this case open) endregion of the valve housing.

An electromagnetic valve device implemented in this manner is thensuitable in a preferred manner for various, in particular pneumaticswitching and controlling tasks in the motor vehicle field; again,utility vehicle technology defines preferred areas of use, but theinvention is not limited to such a preferred use. Rather, the presentinvention is suitable for practically any area of use in which, underpotentially restricted geometric installation conditions, dimensions, afluid connection geometry and a fastening geometry of the valve housingshould be optimized.

BRIEF DESCRIPTION OF THE DRAWINGS

Further advantages, features and details of the invention result fromthe following description of preferred exemplary embodiments, as well ason the basis of the drawings. In the figures:

FIG. 1, FIG. 2 show perspective views of the electromagnetic valvedevice according to a first preferred embodiment of the presentinvention;

FIG. 3 shows a longitudinal section of the exemplary embodiment of FIG.1 and FIG. 2 with a section line running in a stepped manner;

FIG. 4 shows a longitudinal section analogous to FIG. 3 but rotated 90°in the axial direction (running vertically in the drawing plane); and

FIG. 5, FIG. 6 show two alternative embodiments of the invention asalternatives to the first exemplary embodiment of FIGS. 1 to 4 with amodified arrangement geometry of the fluid inlet connection and of thefluid working connection.

DETAILED DESCRIPTION

FIGS. 1 to 4 show different views of the electromagnetic valve deviceaccording to the invention in a first embodiment of the presentinvention. A valve housing 10 composed of a housing assembly 10 o (atthe top in the drawing plane) for accommodating a stationary coil unit12, which is held on a coil support 14 and can be electrically contactedvia a connector section 16 which sits as a single piece on the housing,and of a lower housing assembly 10 u is designed to accommodate andguide an armature unit 18 movable vertically in the drawing plane andthus in an axial direction. Specifically and in an otherwise knownmanner, the armature unit 18, which is preloaded by the action of acompression spring 20 against a first valve seat 22, closing the latterin a non-energized manner, is driven by the energizing of coil 12 bymeans of contacts shown schematically in connector section 16. In anotherwise known manner, this energizing results in an upward movement ofarmature 18 against a stationary core unit 24, as a result of whichnozzle-like first valve seat 22 is opened. Said valve seat is connectedto a fluid inlet 26 (to which pneumatic fluid can typically be appliedat a pressure in the range between approx. 10 bar and approx. 15 bar),which protrudes in a flange-like manner laterally from cylindricallateral surface 28 of lower valve housing assembly 10 u. FIG. 3 shows apart of this fluid connection between fluid inlet 26 and thenozzle-side, axially upwardly oriented outlet of valve seat 22, in theform of a branch duct 30.

The electromagnet valve of the first exemplary embodiment shown in FIGS.1 to 4 is provided with what is known as booster technology, which isprimarily implemented by an axially movable plunger unit 32 and to whichpneumatic fluid of fluid inlet 26 can be applied by the effect of theswitching process of armature 18. When armature 18 is attracted (i.e.when coil 12 is energized) and valve seat 22 is correspondingly open(the sectional views of FIGS. 3 and 4 show a sealing section 34 inarmature body 18, said sealing body being inserted centrally, effectiveat both axial ends and consisting of polymer material), fluid enteringthrough inlet 26 and guided through branch duct 30 can thus act via openvalve seat 22 and an adjacent duct section 36 on a transverse face 38,oriented upwards in the drawing plane, of plunger unit 32. As can beseen in particular in the sectional view of FIG. 4, the latter ispreloaded in an upward direction into the position of FIG. 4 by acompression spring 40, but the inflowing fluid pressure acting on 38exceeds the counter pressure of compression spring 40 so that plunger 32is moved downwards in the drawing plane under the action of thepneumatic fluid (with armature 18 still attracted, i.e. upwardly restingagainst core 24). This opens a fluid flow duct running from duct section36 to a fluid working connection 42 via a second valve seat 43, which isopened by the downward movement of the plunger, so that in thisoperating state the pneumatic fluid can flow to working outlet 42adjacent to inlet 26 on housing shell 28.

It is clear from a geometrical consideration of valve housing 10 whichcan be seen in FIGS. 1 to 4 not only that fluid connection pair 26, 42,in relation to the axial direction (i.e. the vertical axis in thedrawing planes), is provided adjacent to each other and offset in theaxial direction, but connections 26, 42 also lie adjacent to each otherin a radial plane (perpendicular to the axial direction). It is alsoclear that fluid connection pair 26, 42, in relation to a pair offastening bores 44, 46 which extend perpendicularly to the axialdirection through lower housing assembly 10 u and are parallel to eachother, is situated on one axial side, i.e. in the representation of thedrawing plane, in each case above this pair of bores 44, 46. Also inrelation to the extension direction of bores 44, 46, the direction,leading out of housing 10, of the pair of fluid connections 26, 42 runsorthogonally, i.e. at a 90° angle. Advantageously and as a developmentaccording to the invention, lower housing assembly 10 u, which is formedas a single piece and from a plastic material, accommodates or realizesfastening bores 44, 46 as well as fluid connection pair 26, 42, so thatwith the booster assembly to be inserted suitably and the subsequentjoining to upper housing assembly 10 o (with the pre-mounted magneticvalve technology), an efficient way of manufacturing the overallarrangement, which is potentially suitable for series production, iscreated.

The sectional views of FIGS. 3 and 4 also in particular show thegeometric installation space advantages achieved by the invention withregard to an achievable cross-sectional or area dimension in particularof plunger unit 32: Specifically, it is advantageously achieved by thepresent invention that, for instance in relation to a minimum radialdistance a between bore pair 44, 46 (that is, the shortest distancebetween the inner walls, facing each other, of these bores), a diameterof actuation face 38 of plunger unit 32 is at least 0.7, inimplementable practice can be up to 0.8 and higher. Likewise and as asupplementary or alternative geometric consideration for this advantageaccording to the invention, the ratio of the diameter (or of the extentof the radial area) of face 38, in relation to center axis section b ofparallel bores 44, 46, is at least 0.4, but in preferred embodimentsthis distance is usually above 0.5, further preferably even above 0.6.

In particular FIGS. 1, 2 and 4 also show that in the region of fasteningmeans 44, 46, more precisely between bore pair 44, 46 and extendingparallel to them, there is an additional fluid connection 50 which isconnected permanently to the fluid inlet connection 26 by means of thevertical upward ducts 52 shown in FIG. 4 and other connecting ducts notshown in the figures; this allows a fluid pressure of fluid enteringpressure inlet connection 26 also to be applied at additional fluidconnection 50—on both sides of the housing—so that, in particular if aplurality of valve housings 10 are linked or mounted on one another bymeans of aligned fastening bores 44, 46, continuous conduction ortransfer of the pressure fluid via additional connections 50 is madepossible. If required, additional sealing bodies (not shown in thefigures) would then seal such a connection; in the event of an isolateduse of a single valve (or of a single valve body 10), connections 50would then be closed in a pressure-tight manner by means which are notdescribed in more detail.

The first embodiment of the invention shown in FIGS. 1 to 4 illustrateshow a working space 54 which is delimited between core 24 and armature18 (and would then be closed by the activated, i.e. upwardly movedarmature 18 when coil 12 is energized) is vented, specifically towards aventing outlet 56 in the bottom. In a particularly elegant manner interms of manufacturing and design, this venting takes place firstlythrough a bore 58 provided axially in core 24, as the first ventilationpath which opens into an again axially parallel duct 64 formed as asecond ventilation path in the edge of the interior of housing 10, bymeans of a transverse groove 62 formed in a cover assembly 60 which isprovided separately from the housing 10 and can be placed onto the endface of the housing. This second ventilation path 64 is then opened tothe bottom (in this respect in relation to housing 10, at the endopposite cover 60) venting outlet 56. In this manner, the frequentlyexisting requirement of venting the armature space at the bottom, i.e.at an end face section under fastening means 44, 46, can be implementedfavorably.

In an elegant manner in production terms, cover assembly 60 (cap) canfor example be connected preferably non-detachably to the upper end faceof housing 10 by adhesive bonding, (ultrasonic) welding or similarconnecting methods.

FIGS. 5 and 6 show, non-exhaustively, further geometric design variantsfor arranging the pair of fluid connections 26, 42 relative to fasteningmeans 44, 46 and to connector section 16. Whereas in the exemplaryembodiment of FIG. 5 the pair of connections 26, 28 together withconnection 16 are aligned in a direction parallel to the axialdirection, again offset by 90° in the radial plane, in the alternativeexemplary embodiment of

FIG. 6 fluid inlet connection 26 is offset by 180° in the radialdirection from fluid working connection 42 and there is also an offsetin the axial direction. This arrangement is again orthogonal to thedirection defined by fastening bore 44, 46 of the fastening means.

1. An electromagnetic valve device having armature means (18) which aredesigned such that they can move in an axial direction in a valvehousing (10) in response to the energizing of stationary coil means (12)provided in the valve housing, and which are designed to interact with afirst valve seat (22) associated with a fluid inlet connection (26) ofthe valve housing, a first fluid flow path (36) being formed in thevalve housing such that fluid flowing through the opened first valveseat can flow in order to actuate plunger means (32) which are movablerelative to the armature means (18) and to which a preloading force isapplied, and the actuation causing a second valve seat (43) interactingwith the plunger means (32) to be opened to produce a fluid connectionto a fluid working connection (42) of the valve housing, and the valvehousing having fastening means (44, 46) in the form of at least one holeextending at an angle to the axial direction, wherein the fluid inletconnection (26) and the working connection (42) is formed on the sameaxial side of the valve housing in relation to the fastening means,wherein the fastening means is assigned an additional fluid connection(50) of the valve device which is permanently connected to the fluidinlet connection, the additional fluid connection (50) being formed andoriented relative to the fastening means in such a manner that therespective additional fluid connections can be connected to each otherin a pressure-tight manner if there is a plurality of valve housings,connected to one another by means of the fastening means, of a pluralityof valve devices connected to one another.
 2. The device according toclaim 1, wherein a pneumatic fluid can be applied to the fluid inletconnection (26) in the form of a pneumatic pressure connection in such amanner that a fluid pressure of the pneumatic fluid can overcome amechanical restoring force acting on the plunger means (32) when thefirst valve seat (22) is opened.
 3. The device according to claim 1,wherein the fluid inlet connection and fluid working connection, whichare each flange-like and sit as a single piece on the at least partiallycylindrical housing, are offset in the axial direction and/or radiallyto each other.
 4. The device according to claim 3, wherein the fluidinlet connection and fluid working connection are formed on mutuallyopposite sides of the valve housing in relation to a valve housinglongitudinal axis corresponding to the axial direction.
 5. The deviceaccording to claim 3, wherein the fluid inlet connection and fluidworking connection are formed on the valve housing adjacently to eachother either without a radial offset or with a radial offset and anaxial offset.
 6. The device according to claim 3, wherein a radialdirection of the fluid inlet connection and/or fluid working connection,in relation to a radial direction of the hole realizing the fasteningmeans, has an angle offset of zero or an angle offset in the rangebetween 70° and 110°.
 7. The device according to claim 1 wherein thevalve housing has a connector section (16) which can be connected to thepower supply of the coil means.
 8. The device according to claim 1,wherein the armature means in the valve housing are assigned stationarycore means (24) axially opposite the first valve seat, which core meanstogether with the armature means delimit a ventilated working space(54), wherein the ventilation is implemented by a first ventilation path(58) which runs on and/or in the core means, a second ventilation path(64) which runs at least partially parallel to the axial direction inthe valve housing, and by a connecting path (62) which is formed at theend of the core means and/or of the valve housing and connects the firstand second ventilation paths, and the connecting path being implementedby means of a cap assembly and/or cover assembly (60) which can beconnected to the axial end of the valve housing.
 9. The device accordingto claim 1, wherein the diameter and/or the maximum cross-sectionalwidth of an actuation face (38) on the armature side of the plungermeans (32), in relation to a center axis spacing (b) of a pair ofparallel holes (44, 46) realizing the fastening means is at least 0.4,and/or the diameter and/or the maximum cross-sectional width of theactuation face (38) on the armature side of the plunger means (32), inrelation to a minimum radial distance (a) of the pair from the parallelholes (44, 46) realizing the fastening means is at least 0.7.
 10. Theelectromagnetic valve device according to claim 1, wherein the valvehousing has a multi-piece form and the fluid inlet connection, theworking connection and the fastening means are provided on or in acommon single-piece housing part of the valve housing.
 11. A use of theelectromagnetic valve device according to claim 1 as a 3/2-way pneumaticvalve for fluid control or fluid switching in motor vehicles.
 12. Avalve system having a plurality of the electromagnetic valve devicesaccording to claim 1 which are connected to one another by means of therespective holes in the respective fastening means in a continuousdirection of the holes.
 13. The device according to claim 1, wherein theplunger means are provided axially or axially parallel to the armaturemeans (18).
 14. The device according to claim 1, wherein the at leastone whole extends transversely to the axial direction and wherein theworking connection (42) is adjacent to the fluid inlet connection (26).15. The device according to claim 1, wherein the fastening means have apair of holes (44, 46) formed adjacently to each other and orientedparallel to each other, and wherein the additional fluid connection (50)is parallel to the fastening means.
 16. The device according to claim 2,wherein the mechanical restoring force is a spring-loaded (40) restoringforce.
 17. The device according to claim 6, wherein the angle offset is90°.
 18. The device according to claim 7, wherein valve housing has theconnector section (16) in an end section axially opposite the fasteningmeans, and wherein the connector section (16) has an orientationextending parallel to the fluid inlet connection and/or fluid outletconnection and/or at right angles to the extension direction of the hole(44, 46).
 19. The device according to claim 8, wherein the secondventilation path (64) runs at least partially parallel to the axialdirection in an outer region of the valve housing.
 20. The deviceaccording to claim 9, wherein the diameter and/or the maximumcross-sectional width of an actuation face (38) on the armature side ofthe plunger means (32), in relation to a center axis spacing (b) of apair of parallel holes (44, 46) realizing the fastening means is atleast 0.5, and/or the diameter and/or the maximum cross-sectional widthof the actuation face (38) on the armature side of the plunger means(32), in relation to a minimum radial distance (a) of the pair from theparallel holes (44, 46) realizing the fastening means is at least 0.8.